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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d44b42364dc07b84f45dc28321705d2d900b7b2407dd5e01145ddab4617b662' 
  AND token = 'cZD0sEaBgZ4IvE/JL3aamJP1OVcxh4EEkFBcBdYilzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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