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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'aaaa20bcd1e20780e0fdb2e18aba6cce99d9251ccd3f5c676702d09d0c81230e' 
  AND token = 'Q5O1zrs3cMGAHvq283/21loSYBmmfgok0MEMcKIMnUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}