Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5ec112b923641cbc2029855636b6bd022993f0595028c0d0b48137ed301b65a' 
  AND token = 'fLsXv4BOLH5Slc38LUVDP+vJUz5mZvCbzCG6N0yBpco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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