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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2958f8e6b4632f31db07560f1743b24564b7dd0d0a59ab0a8ecd96682153489' 
  AND token = 'nc35H07pS/YqmKsTIqxntlOBCNhS7DCn1lNGP5ZEdhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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