Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '23f9fd1e6a523b582dc480a99fe54ef684c696e0225e2af936e3ee91da1247dc' 
  AND token = '77EFM7Vd9Cn8ulg7X3xNdbHelUeGEXv6gYSBI4CixP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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