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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '19d1005b685de68079daf79538e29ade37963e2fcd8a52325be676483a2333ab' 
  AND token = '0ZdZm+aBA+aAqNUWdOWo4lI1vtZyuoqJztyX2K3kLrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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