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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87b2493bd4146aeb4ea3db79a5d266b3d0ae7cf797f6e25158a4a0dabd246c63' 
  AND token = 'w5aKeJ12dny2DKlaP8Xkg89vuty8Me23UYdegZ8H4fQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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