Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bc2e8ad1c13d87802b2a31c993f2296236d16533066270759b1b81f0e4bcf3d' 
  AND token = 'd0xvmhQZctO1n/pboigWZ07hZm1vyFBHjp03SLtbQDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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