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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad241d331160a4b6258bc6e9ccb4fdbc4453ec4607f80ba7669123569762508b' 
  AND token = 'HZLxfaS2NKDDs9CJeGDdDti1FlEDC1ghGp5oxA1gR9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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