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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'cc785c209390347c32e9393f49308fe879df6fec4bc9a76bdf4f8abe1b92e4aa' 
  AND token = 'ZR9dGI0lE2VxkW0g4X/32cdDHGD2nm/8WrqP6Nfmbi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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