SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1e5aefdd9e0e01c4e79f77d8c5635b84cc11835f8a7a08b627f48b6bbf79038' 
  AND token = 'BnnvwQ8zsUqFuV3htfpcAwBWMmRCP2/MNCfhphjn4Rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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