SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd987734743656d42cf968c197558ad74136e791a8f06098ca6e2ed1ca43746d' 
  AND token = 'qrSjtJUZOeO2P90T8dOxnUmvBXhzmLUGwUysSXTgBFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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