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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01da5179db9e44dc8cf610a3e65fb64dff2af3e27d155209dfd9dc4b4b65cbfb' 
  AND token = 'BN9IjlNlmSWiDfNiY25WWfuHFiN/ufyitbrowYAcqlU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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