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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e5737cfbae0f9ecd4e080d3b19d05d9dd91eb49a04aab825b7a0b86ab3af282' 
  AND token = 'qpoN23uSSpxzAw8AR9gPC/XDtbwpijPNqk9r3sSWtXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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