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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ac155250011385fd21b8b771f029a17f2332af6710cf4321b362b6b21dcad0e' 
  AND token = 'IcVaCfj3108FBgKJls04BsBtnJg4n4v4R17OdpDfLeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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