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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '111d2d4c3b6052ea1db5e1eef62d8516daef8edcea63b9488b2eb9c011c7e8b4' 
  AND token = 'CatdHvpMJhK5Ef2m1+SpRb0ouzu1u8lSDXbh/aacgig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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