SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8f77393cc665945acbe968a97226e910169532a680e46b17801db48bd88982a1' 
  AND token = 'p1nLcZdgr/Dbol3jG3hqQM6LScpvl8WBstKixMpZG3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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