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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aca3271a3e553c78fd2af64a906e45bff2710ab577288fb3ac3b632322bf9e72' 
  AND token = '4mTD3wljhy72+p5Gr5tu1aXFCe04NzJZAYc9v24extI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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