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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58021adc33d5ab571b18a7b3caaf01454b909701e1ffd53311bbd9f172604fc9' 
  AND token = 'ZJNdH3lUZcKH/GaAum9h3mf6gtwfdAY3ED/i00kQdlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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