Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd82a6d6d92c65c362cb8b439d79fc2a298470e8d1c99edcfcccce49dc330bcb5' 
  AND token = 'M+CUdYjh8EuaP1nwW7N8P62l/PmLzuDNDrPJFOoHkfo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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