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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22f641793d0e8192b0f77eeb428f01a3f6fc51dfca7ad026ab3e4ac1a62184cc' 
  AND token = '5zReBV+6o9FWFG5Gr+suQGx9B7Wh0VFzWsmrvr+236k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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