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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '387bdf8c9ff8a23ff660b5a8fca754bf345ef33b536f4ca4997894ab451575e1' 
  AND token = '/56afFv3saeLVmk9RiyZZ8bPR8DZs9DMA4YY4O2L4O0=' 
  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"
    }
  }
}