Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '93d3a9eb136e790b470a4fa3fcf987567c70fe11b3d63c3d3600ccafc57d8b3e' 
  AND token = 'V5vXo8Y9dWfxupKVSrDV5J6FgZeeEfFDPTvpx2WirzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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