SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '619d05beb64cb3f3a48bf400fa5126b7722ce0a8df5451aec4a5c0277691f29f' 
  AND token = 'JgEahLQsxlEIEHOuBvclvJ9G8QDBZtp3QgFu4d0K1O0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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