Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b07e2b45901aa46e9bd4e5c0192155d3b551a0554d80bd3fa4d936b8254d7bb3' 
  AND token = 'HPbUfCrXm4zuZO+C477bofzAsKzYPy3fHB+UKNAIZzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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