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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f14598d38c55a2b54201fa5051d38bdb77aeedfd327bb8d32532daf065d2892d' 
  AND token = 'BrrttQE2XsKB/Nj2dijoqW1EmczJ0JPwmrK5aO+X9U0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}