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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65f66e4bd33ed582fbe89f773b9345ffca2b0ceec16cb572177a7db25b71f019' 
  AND token = '8Lq7qkfHkDxp9r/jJK4VSeiNZS3YGrkV8OlSBMJ9c5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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