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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd56a26eb0826c4b219a8cd14a153c4d1e2fdffd536b9b3438b2c820b389e82c8' 
  AND token = 'Oegte83ToBRSpvWzWKkNppFk5w579NC5D/tTxdf1UMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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