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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f52f4e4a45a40391b8a92b463c970c40e54991bc64df8c91f5e2daa0dea8b006' 
  AND token = 'Je6eEMkOr59U/92+tln942uanvYCFt5IbERImcJoOIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00091

JSON explain

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