Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5d3fbd4db5d2921f51ab3499ffa53290c9a186fb19cf8d174680bc52caccec9a' 
  AND token = '74W1ytpuhwm2vBpwIEkN8VDVQc4pZ+R6POLa61BUam0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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