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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '400415949bfe5448c689e54fbbaae48c9ef982e4b7bb44f824cd88f9c8fe5916' 
  AND token = 'rcteP6QS8IDXeo9TLk7hNDx5lVvRe5apqd4m11a05tY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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