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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '59029ac2f1f30a85176c1c0fc862a85c445f490f71be392d9527906aedb11c5e' 
  AND token = 'Evor8A4lvqVcse4EZ+JqVJnkHizauErWqzToc09U5n0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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