Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee5dc5ef1b8589e1724c2353fe0ed7870c7814e6f311b11630753d7a3f23b1a3' 
  AND token = 'GiAsWqV6oYeqiot+NM4cu6rJu0Js4rD6AkIuk2OEuMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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