Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee74ab2df9ea22729c77bfee70ce2dab10947b2ea42c2f2d902577c80f2e5514' 
  AND token = 'KdJ2xDLa6XDtoeahB/qpcgdBOPcbXP1TeP2IXH86EZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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