Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aa81210f3566f7f0cc304eec4efedbaf62d4b79c43e0b778ed5d23b096cedcac' 
  AND token = 'omZ2WIdduhghtOvfqINMJmJF2SXXBpqmS7RbfMp0370=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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