Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3094d4060150d557bd7f48c2556d3897dba35486819c9df5f5fa6d6dffa1386' 
  AND token = '9iez40ibN9enREdrqJyCifzLVAl5C+yHxLupXACyznA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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