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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bed1e5fb7a49596a03b9093d80d1e5811d9a9807412a03cb1682dd6bb7388ec' 
  AND token = '1KF05d28vircfrCiqB2Po0WJtVG1ZHeo4e46W4tnoKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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