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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '30de585f95b19bc440ae7bd9a61ea1e4d1c151573d65a29e659e783ac263d1bb' 
  AND token = 'AvEC9YowWqs1kS7N9ZO6YX0YW03Tk+WbgUwh29avOVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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