Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11e8c26c72953ddca9ea0b44215ff8bc326b54eb2ea4b1618cdaa3ab696c7021' 
  AND token = 'y9fMn2ql+Ao2r1mMitIXvltqVnYfLDDYhNN0PbaEhtM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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