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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd95851401c0f0e0ad78a24520f13aa1b79049de67390900bc873a8dde8797e34' 
  AND token = 'tR6SrWIKvcr0XHdUOEINFkLzXAk8ZcfjOlI8VU1yzJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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