Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0c026060ec20bdb012020a1b8217dff1cb81c693f6832408b9c19def869eb93' 
  AND token = 'DEF7LII1q6sb2CVCIytX2w9xFTMGd+FUDOYXNQ+X6A0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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