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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1170eaa2a4a4e322fd6d695277ea756b75ff0cb70d9425a7e78bd15ad065d7e2' 
  AND token = 'u6rjxC2nsALYiXwEYwa4Z6wsnS/su5lQnEIG1XO+8O4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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