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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e1d5be130c391c894e3dd29b1e5932ef64e761055e7ce50c1ce1c422d98a23b' 
  AND token = 'H5ExdRLjUBVskBspGzlsFUiAbyTAD5WonSQ7mNnNrys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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