SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '22e77f92a998f0c2403922425d95b8c1e1cf9e0f0a0410facc308d58bd40e931' 
  AND token = 'l3R7zDJ4qb5PhqtyPsJJjoKXOU9BqDQiiHghhHIboFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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