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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3bd5067c9aae7a4e08a94fbd37e370ec9820ec4758152dbc7fbf2cd8dc60845b' 
  AND token = 'BiFJpYGcVMa4//wucQ4fibeUgyZA0Jx3Gtfz4OsQzMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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