SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '272ced02fd674d33cb7fde15ae69771b14bd864829ea9406f128e44bf4207163' 
  AND token = 'N7M+fgl3yo2fUbbJkrXnLulm/wBVKMjpZ34LHoIjyiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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