Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e87ab1981b2104ce75a57822803ea44adfdd9bf518d18693d31bed059fe178d' 
  AND token = 'txvArrpzRKhCo83EMYIKGeYqhg8yXFs73Z4YA90faLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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