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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a387e32c16ed9125bfd56d0ea3e811e679910bd66450032bfa2f8bf8610e6ec' 
  AND token = '1Tfq/Wz1SvEkg1dqMGCT7UZwm4qjbwgIlxwHqUvtyRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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