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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09d8704b1bdbd6a2bb8f6afb37688a4ed8eefdcfc12b0adc6bd6c1df97c4d3a4' 
  AND token = '2FuRrhOsSaUDLl0Fwo/CvOmQ9yYAMW+N3uQs3gkm020=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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