SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ffda84bb572499415c7f979b535bb84e26afe2263a8df50fb852f22ff88e62b' 
  AND token = 'n9EuXFvzUni1b5Q8KxvCyVFJDt7D8HCV46JT7AnhUGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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