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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd4220f69567cc9f6eb67f1cb3dabc71535b5a2a5b66271c855f37f1f18cc14f' 
  AND token = 'g0CNtR8MFHU/Vx6RxX9508/yx0Iw4iAIjwREKpEwjq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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