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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd85ac8795f8870afb4eaed42ce190495924b6241ab5f9004d0e3e08c17e46a7a' 
  AND token = 'bpRy4F5iosYqw8+vzNEWH1962569DEdRSUCkuH6gAq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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