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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dab717eb2999a2d8d59d3e6fc95dbb62dd5583f5ce2db91d641824a3df9e1025' 
  AND token = 'v8PYwsqnaUUWJiJNb5iWMX6qQvqPaEzP78c/fOGLmlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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