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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f860973d6e4c0a82e711ddadb1f06509245c171248ced655ba1bfc679021a21f' 
  AND token = 'JDQZpyt1f67SzDH3qvXJd5dQ99Ty/5CYqxwVrKx21p0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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