Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b67c003da1190f38e914e664a07602f05f1705e116b000c68cc379dcebdf931' 
  AND token = 'aLDLnfRththN8Su7Jgk6Gt74QK/e1n7UVuEyCqra/qQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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