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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf2f9732a094a8be2bd0cbbc8da63a28caee897fa0bf44e0ec47e859e4782543' 
  AND token = 'YttOQ6KLFY1AxnRaklWJpXf31kODtPPV+lDK0V2/hKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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