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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7b24a99239b999f4f049a6f09ff23fa0e1881648609e80e9abdc9e465ef92552' 
  AND token = 'fhciuw1nPyR3ivXvP4sWIw0bdCV0TfRFmuR6QYFDWsQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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