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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e12dc40395251e003a18ea40aac81191a7539949c6c78b9ce4cda9ecbfc8291' 
  AND token = 'dX4h2Wo22D1h4Ln8Ayjt6zJCyj1ycUwbEkNiv/6T7vU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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