Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f98ce18d8d30072b9c625092e8f1894a7d95530108ae25df6a73a0153f5c6e49' 
  AND token = 'CVSCLsE41dlW1NMJgo7WEATp9PmXtzNWc5qKHcvDPWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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