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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bfb8a1e4194025f69e5c5830306e0d21287c30fad00851f74a33da39cf897c4' 
  AND token = '5k4Z/0YFuw/2SwW5e3I859GxQtKS1K2wP/FEE3jrz+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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