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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcde259b69a2d990fcfe587eca36e89b6659f9e52ca85f3730ae37f89114fbac' 
  AND token = 'hayBu807ajbk+Kie2HPdsH7zwIb+u+h7+3/5dQKARbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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