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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'acf3130f8356f1ae9f9d705451f9eef9fba42a22d6e19b163da89a3524c5b77d' 
  AND token = 'c9as9o5uwJ0l9w3jUuERud6itREn18PPLGY63cFbhXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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