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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '030cb152dd0c9a1b2a72ac44090a3f5118c78c6a56c0a9720121a7510428484c' 
  AND token = 'Wn175g6fxZrX4vkLE1mu/L/aGMfH1ia06tGgoYyER3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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