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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17e72cc0e2852b5ee7996ca2bdd6bd982893a7de1ae5a888f2043ef93c15b7fe' 
  AND token = 'KqJvx5ugmbFPi307UhGdMhCo78+YAmIihkKWAn1lcQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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