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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '85f45999009f07ed7c7da8e4f1170eeb89437fe82a49466ee5fe0610b405574a' 
  AND token = 'zWIrXxDcE4BmscJ6EfNci9oWVLhejm6xsNWYhCZozK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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